14N, 17O, 103Rh NMR Studies of Rh(III) State in Diluted Nitric Acid Solutions |
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| Authors: | Fedotov M A |
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| Institution: | (1) Siberian Division, Russian Academy of Sciences, Boreskov Institute of Catalysis, pr. Akademika Lavrent'eva 5, Novosibirsk, 630090, Russia |
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| Abstract: | The state of rhodium(III) in nitric acid solutions diluted with 3M HNO3 or water was studied by 14N, 17O, and 103Rh NMR methods. The 103Rh NMR chemical shifts significantly depend on the ionic background of the solution. Concentrated nitric acid solutions (c
Rh = 0.5–1 mol/l) diluted 100 to 200 times retain the polynuclear Rh(III) forms with double ( -NO3, -OH) bridges. The predominant form in the diluted solutions is a dimer. |
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